404909 has 8 divisors (see below), whose sum is σ = 432480. Its totient is φ = 378000.

The previous prime is 404851. The next prime is 404941. The reversal of 404909 is 909404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 404909 - 2¹⁶ = 339373 is a prime.

It is a Duffinian number.

404909 is a modest number, since divided by 909 gives 404 as remainder.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1814 + ... + 2024.

It is an arithmetic number, because the mean of its divisors is an integer number (54060).

2⁴⁰⁴⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

404909 is a deficient number, since it is larger than the sum of its proper divisors (27571).

404909 is a wasteful number, since it uses less digits than its factorization.

404909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 404909 is about 636.3246026990. The cubic root of 404909 is about 73.9808204494.

It can be divided in two parts, 404 and 909, that multiplied together give a square (367236 = 606²).

The spelling of 404909 in words is "four hundred four thousand, nine hundred nine".